Detecting and ejecting means for packing strip applying machines



Aug. 12, 1947. P. E. PEARSON 2,425,637

DETECTING AND EJECTING MEANS FOR PACKING STRIP APPLYIIK MACHINES Original Filed Dec. v27, 1940 8 Sheets-Sheet 1 l E I 3mm I w I I Aug. 12, 1947. PEARSON 2,425,637

DETECTING AND EJEGTING MEANS FOR PACKING STRIP APPLYING MACHINES Original Filed Dec. 27, 1940 8 Sheets-Sheet 2 y M @S I Aug. 12, 1947. P. E. PEARSON DETECTING AND EJECTING MEANS FOR PACKING STRIP APPLYING MACHINES Original Filed Dec. 27, 1940 B Sheets-Sheet 3 Aug. 12, 1947. P. E. PEARSON DETECTING 5RD EJECTING MEANS FOR PACKING STRIP APPLYING MACHINES Driginal Filed Dec. 27,1940

8 Sheets-Sheet 4 l-l k lu lllllhlllllll mmr Aug. 12, 1947. P. E. PEARSON 2,425,637

DETECTING AND EJECTING MEANS FOR PACKING STRIP APPLYING MACHINES Original Filed Dec. 27, 1940 8 Sheets-She a 5 Aug. 12, 1947. P, R O v 2,425,637

DETECTING AND EJECTING MEANS FOR PACKING STRIP APPLYING MACHINES Original Filed Dec. 27, 1940 8 Sheets-Sheet 6 Aug: 12, 1947. P. E. PEARSON DETECTING AND EJECTING MEANS FOR PACKING STRIP APPLYING MACHINES Original Filed Dec. 27, 1940 8 Shets-Sheet 7 w Nm m w w NM N N MFH QNN QQN Aug. 12, 1947.

P. E. PEARSON DETECTING AND EJECTING mums on PACKING swan APPLYING MACHINES a Sheets- Sheet a 0riginal.Filed Dec. 27, 1940 iveiziorx 9404 E. weso/z/ .WPWQS Patented Aug. 12, 1947 DETECTING AND EJECTING S FOR PACKING STRIP APPLYING MACHINES Paul E. Pearson, Chicago, Ill., assignor to Continental Can Company, Inc., New York, N. Y., a corporation of New York Original application December 27, 1940, Serial N 0.

371,974. Divided and this application Novem ber 16, 1942, Serial No. 465,764

17 Claims.

1 The invention relates generally to the manufacture of metallic containers having solderless side seams wherein non-metallic packing strips are included, and it primarily seeks to provide,

in combination with apparatus for applying said packing strips, novel means for detecting and ejecting all such sheets or body blanks as are devoid of packing strips after having passed through the packing strip applying means or before they are passed on to mechanisms for completing the formation of the container bodies.

In my U. S. Letters Patent 2,319,825, issued on May'25, 1943, there is disclosed and claimed apparatus for forming packing strips and adhe sively attaching them along edge portions of successively presented container body blanks so that as said blanks are formed into containers the packing strips will be positioned in the side seams thereof. An example of a form of container in cluding a packing strip in the solderless side seam is illustrated in U. S. Letters Patent 2,171,711, issued to Walter G. Plumb and Herbert Schrader on September 5, 1939. The present application is a division of my copending application aforesaid.

An object of the invention is to provide in apparatus of the character stated means for detecting the absence of a packing strip on any given successively presented container body blank and for ejecting such defective or incomplete blanks from the apparatus.

Another object of the invention is to provide in apparatus of the character stated in which the body blanks are fed station by station, means located of one station for detecting the absence of a packing strip on a blank presented at said one station, and means at another station controlled by said detecting means for automatically ejecting all blanks detected to be devoid of packing strips.

Another object of the invention is to provide an apparatus of the character stated in which the ejecting means is electrically actuated and the detecting means includes a reciprocable contact member engageable with strip bearing blank edge portions and forming a part of a control circuit normally insulated and broken by the engaged packing strips and completed only by blank metal contact occasioned by an absence of a packing strip from a given blank.

Another object of the invention is to provide 1 an apparatus of the character stated in which the ejecting means includes an actuator slide constantly reciprocated transversely of the direction of feed of the blanks, an ejector slide j. movable at times with the actuator slide, and

2 latching means carried by one slideand engageable with the other slide to cause the slides to move together only when the detecting means has detected the absence of a packing strip from a blank.

Another object of the invention is to provide in apparatus of the character stated, an ejecting means including a latch position determining means embodying a rotary cam having a dwell portion effective to delay the latching function until a blank detected as being devoid of a packing strip has been moved to the ejecting station.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be morefully understood by following the detailed description, the appended'clairns and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a fragmentary side elevation :ill'ustrating the invention as embodied in'a container body making machine.

Figure 2 is a vertical cross section of the machine portion illustrated in Figure l, the section being taken at the position of the packing strip applying station.

Figure 3 is an enlarged fragmentary Vertical cross section taken at the detector station.

Figure 4 is an enlarged side elevation illustrating the parts at the detector and blank ejector stations, parts being broken away and in section.

Figure 5 is a fragmentary plan view at the position of the blank ejecting slides, the housing cover being removed and parts being broken away and in section.

Figure 6 is a fragmentary vertical cross section taken on the line 645 on Figure 5.

Figure '7 is a cross sectional viewltaken through the blank ejecting mechanism and the ejected blank receiving housing.

Figure 8 is a fragmentary perspective view of a body blank with a packing applied thereon.

Figure 9 is a diagrammatic view illustrating the relative timing of the blank feeding, detecting and ejecting devices,

In the example of embodiment of the invention herein disclosed the invention is shown as embodied in one section of a container body making machine. This type of machine is well known and an example of such a body maker is disclosed in the U. S. Letters Patent to Troyer et al.1,772,- 820, issued August 12, 1930.

In the type of body maker referred to, can body blanks are withdrawn one by one from a supply stack and are fed intermittently, or station to station, along suitable supporting ways. At one station the blanks are fed from a low level later-1 ally through grain breaking rolls and are returned by these rolls to a higher level along which they are again fed stepby step. -At another-station the lateral edges of the blanks are notched and slit. At another station the edge hooks which locking relation, and at this same stationa-bumping steel engages the hooks and serves to finishthe seam.

The herein disclosed first section .of the improved body making machine, preferably .as-

sembled as an attachment to the remaining standardized and conventional parts of the body making machine, includes a base 5 which may be a separate base extending throughout this particular section of the machine only, or it may be an extension from the base of the main. or body forming section ofthe machine. The .attachment includes a bed 6 forming an extension of the bed of the main section of the machine and which is supported on frame legs 1. .side housing members 8 which form extensions of the like portions of the main section of the machine and are arranged in parallel spaced rela- 'tion in the usual manner.. The housing members 8 support suitable 'slidewaysor guides :9, 9a for the lateral edges ofv the blanks l0 which are fed along the ways step-by-step, or station-by-station, by the conventional reciprocable' feed. bars I I in the manner well known to all workers in the art fa-I miliar with the so-called l-B body maker herein referred to. The blanks H] are .fed between the usual upper and lower center guide members l2, See Figures 1 and 2.

The machine attachment frame supports a blank stack l3 from which blanks are individually withdrawn from the bottom in the usual manner by a suction cup l4 mounted at the upper end of a vertically reciprocable carrier which is crank and link connected as at I6 with a thrust arm I! in turn connected with a crank l8 driven by power transmitting connections 19 from the power shaft 20. The power shaft 20 has bearings as at 2| in the gear housing 22 and is cou'pled as at 23 with the main power shaft 24 having bearing asat 25 in the gear housing 26. See Figure 1.

Within the gear housing 26, the main power shaft 24 is coupled in driving relation as at 21 with two cam shafts 28 and 29, the cam shaft 28 forming a part of the attachment herein disclosed and the shaft 29 being a part of the standard body maker or the main body forming section of the composite machine herein referred to, The shafts 28 and 29 rotate in suitable bearings 30 supported on the machine framing. See Figure 1.

The machine attachment includes a blank grain breaking station'generaily designated 3| at which each blank fed from the'stack is fed laterally through grain'breakingrolls'and is again returned laterally onto the blank feedways at a higher level, the blank shifting means being generally designated 32 and being driven by'power transmitting connections! 33 from the" cam shaft 28. At the blank rolling or grain breaking station each blank is stopped or register-ed by a rockably mounted'stop member 34' which functions in a well knownmanner and has move-. ment imparted thereto, for the purpose of alternately moving into position for. intercepting blanks "and then moving away, by cam androller The bed 6 supports equipment generallydesignated 35. After leaving theegrain breaking station 3| each blank is fed to an idle station enerally designated 36, and at the next feed step is delivered at the packing strip applying .stationgenerally designated 31.

Another idle station 38 follows the strip applying station, and the next step station, generally designated 39, is in the nature of a packing strip absence detecting station which is immediately followed by. a station generally designated 40 at which all blanks which are found not to have fajpacking strip applied thereto are ejected. The detectin'g andzblan'k ejecting mechanisms mountedat '39 and 40 are the mechanisms with which the present invention is principally concerned.

See Figure 1.

b At the packing strip applying station there is mounted a web supply roll 4| of packing strip material. The web 42 of packing strip material has a heat fusible adhesive coating on its under face and is fed :step-by-step through constantly driven draw rolls '43'andwover an intermittently driven drag feed Froll44soas to expose packing strip lengths thereof successively over the'die block 45. As each packing's'trip length is exposed over the .die block it is severed by apa'ckapply the strip to the side edge of the body blank I0 then presented at the applying station. The strip heating means isindicated at '48, and'the rotor indexing means, the plunger projecting and retracting means, and the pneumatic control means all are disclosed in detail and covered in my 'copending application for U. S. Letters Patent, Serial Number 371,974, filed December '27, 1940, now Patent No. 2,319,825, "issued May 25, 1943, of. which the present application is a division. One of the applied packing strips is indicated at 49 in Figure 8. 1 I

Obviously, should any body blanks be fed through the machine and not have a packing strip aflixed thereto, such blanks woulclbe formed into cans which would leak at the side seams. Such cans would have to be destroyed because itw'ould be impractical to attempt salvaging thereof. It is the purpose of the present invention to prevent this waste by providing novel means for detecting blanks devoid of packing and ejecting them from the feed line so that they will not be made into cans and can be again fed through the machine or otherwise'used.

The station immediately following the packing strip applying station is an idle station 38 as hereinbefore described. The detecting mechanisms are positioned at the next succeeding station designated 39, and the blank-ejecting means is located at the following station which is'generally designated 40. At the detecting station a special bracket 50 is mounted and this bracket supports a rock shaft 5!. See Figures 1, 3, and 4. The rock shaft rockably supports a bell crank lever 52 which carries the conventional blank edge clamping and stopping equipment generally designated 53 and which includes an actuator roller engaged by an actuator cam 54 secured upon the shaft 28. The bracket 58 also supports a shaft 55 which rockably mounts a bell crank lever 56, one arm of which carries a roller engaged by a detector cam 51 secured upon the shaft 28, and the other arm 58 of which is normally forced upwardly so as to hold the roller against the cam by a spring plunger 59 carried by the bracket. The arm 58 removably supports a detector unit comprising a base block 68 formed of insulating material on which is mounted a bearing member 6|. See Figure 3. A detector or conductor bar 62 is pivotally supported intermediately of its ends on the bearing member BI in position for having one end thereof overlie the edge portion of a blank presented at this station. This overlying end portion of the conductor bar 62 carries a depending detector pin 63. The portion of the container body blank opposed by the detector pin 63 rests upon a supporting rail which is suitably grounded as a part of the electrical detecting and ejecting control circuit. Movement of the detector pin toward the rail 64 is limited by an adjustable stop screw 65 which can be accurately adjusted to permit the pin 63 to move downwardly far enough to engage a blank edge portion devoid of a packing strip but not far enough to engage the supporting rail 84. The other end of the contact bar is lifted by a spring plunger 66, and this contact bar is connected in the control circuit by a screw 61 which serves as an attaching medium for the conducting wire 68. It will be obvious that during each rotation of the cam the detector pin 63 will be moved into and then out of contact with the particular container body blank presented at the detecting station.

The ejecting mechanism located at station 48 includes a housing 69 having a removable cover and mounted as at I8 on the left side housing member 8. See Figures 1, 4, 6 and '7. Within the housing a slide member H is constantly reciprocable transversely of the direction of feed of the blanks in a slide guideway I2, said slide being link-connected as at 13 with the upper end of a rock member 14 pivotally supported as at and having its lower end equipped with an actuator roller engaged by an actuator cam 15 mounted on the shaft 28. An ejector slide 11 is slidably mounted above the slide 'II in a guideway 18, and this ejector slide moves with the slide II only when the latch 19 carried thereby is depressed into the path of movement of and contacts the actuator plate portion 88 carried by the slide II, said plate 80 having a recess 8| therein for receiving the end of said latch. See Figures 4, 6 and 7.

The latch member I9 carries a depresser roller 82 projecting from the top of the latching end thereof, and a spring 83 normally holds the latch lever in the lifted or unlatched position determined by the stop 84 formed by the projected opposite end of said latch member. The slide 11 has an opening 85 therein through which the latch 19 projects and also carries an ejector plate 86 removably secured to the end thereof and including a notched end portion 81 for normally underlying the side edge portion of a blank presented at the ejecting station.

Whenever the ejector slide I1 is latch-connected to the actuator slide II, the blank presentedat the ejecting station will be engaged by the notched end portion 81 of the slide and moved laterally far enough to be presented between constantly rotating ejector rolls 88 which will serve to eject the blank from the feedways.

As each ejector blank is being moved through the rolls 88 it is caused to pass between a straightening roll 89 and an opposing steel 98 and thence into the ejector blank receiving magazine 9|. The r011 and steel equipment 89 and 98 serve to remove from the blank the tendency to bend impartedthereto by the rolls at the grain breaking station hereinbefore referred to, and while the blank being ejected is moving through the rolls 88, the overlying guide member 92 disposed at the ejecting station prevents upward buckling of the blank.

The means for bringing about a latching of the ejector slide'with the actuator slide under control of the detector mechanism will now be decribed. A solenoid 93 is mounted in the housing 69 and is connected with a suitable source of power diagrammatically illustrated at 94 which also connects with the conductor line 68 connected with the contact bar 62 in the manner hereinbefore' described. The solenoid is also grounded, and thus a control circuit is completed whenever the detector pin 63 engages the bare metal of a blank devoid of a packing strip at the detecting station, said circuit being completed through the ground connection of the rail 64, the metal blank I8, the detector pin 83, the conductor bar 62, the conductor 88, the power source 94, and the ground connection'o-f the solenoid. See Figures 4 and 5.

Whenever the solenoid is energized by completion of the circuit in the manner just above described, the core 95 of the solenoid is retracted against the compression spring 96 which engages a latch lever 91 to which the core is link-connected as at 98. The spring normally holds the latch member 91 against an adjustable stop 99. The latch member 91 includes an undercut nose portion I88 engageable by a latch nose I8I removably attached to the upper end of a vertically reciprocable member I82 which carries a roller at its lower end and is yieldably held against an actuator cam I83 secured upon the cam shaft 28'. It will be obvious that the latch nose I8I is constantly reciprocated and also that it will engage the undercut nose portion I88 of the latch member 91 only when said latch member is moved into the path of travel thereof by retraction of the solenoid core in the manner illustrated in Figure 4 of the drawings.

The latch member 91 is pivotally mounted on a rocker member I84 fulcrumed intermediately of its ends as at I85, and it will be observed that the solenoid also is secured to this rocker member as at I86. A compression spring I87 normally serves to lift the end of the rocker member I84 opposite the end which carries the latch member 91, an adjustable stop screw I88 serving to determine the normal position of said rocker member.

The spring lifted end of the rocked member carries a pivotally mounted actuator finger I89 which is yieldably depressed by a compression spring I I8 and which overlies the latch depressing roller 82 carried by the latch member 19. Thus each time the solenoid is energized the latch member 91 is moved over into the path of vertical reciprocation of the nose IM and upward movement of said nose will serve to lift the end of the rocker member I84 to which the latch member 91 is attached and depress the end of said rocker member which carries the depresser finger I89,

and it will be obvious that depression of the member I89 will serve to depress the latch member '19 into position for being engaged by the actuator slide thereby to cause the slides i1 and H to move together and elfect an injection of a blank in the manner hereinbefore described.

It will be obvious that as a blank detected as being devoid of a packing strip at the detecting station is moved from that station 39 to the ejecting station 40 it will move out of contact with the detector pin 63 and break the solenoid circuit effective. to retract the core 95 and initially position the latch member 91 in the position illustrated in Figure 4. Were no means provided for retaining this initial position of the latch member 91 while the blank is being moved to the ejecting station, the rocker member I04 would not be properly actuated to effect latching of the slide H and ii in the manner hereinbefore described. In order to provide for the delayed action necessary to permit shifting of the blanks from the detecting station subsequent to the closing of the control circuit at the detecting station and prior to latching of the slides at the ejector station, the cam I63 is provided with a dwell for holding the latchnose lill in the position illustrated in Figure 4 during the delay interval stated. This cam includes an additional'rise portion efi ective after the delay interval referred to to additionally lift the nose 'IOI, the latch member 91 and the rocker member I84 for effecting depression of the finger I09 and the underlying latch member 19. During the delay interval referred to, the latch 91 is held in engagement with the partially lifted nose by reason of the undercut I00 despite the fact that the solenoid energizing circuit has been broken.

In Figure 9 of the drawings there is shown a chart or diagram illustrating the relative timing of the blank feeding, detecting and ejecting devices in which the vertical linesindicate units of time, or distance travelled, and the lines traversing said vertical lines in generally horizontal direction indicate the relative timing of the various mechanisms. The uppermost line indicates the timing of the sheet or blank feeding devices. The second generally horizontal line, reading downwardly, indicates the timing of the cam 57 which operates the detector pin 63 (see Figure 3). The next horizontal line indicates the relative timing of the energizing of the solenoid 93 which is energized when the detector pin makes electricalcontact with a blank devoid of a packing strip. The next or fourth generally horizontal line indicates the relative timing of the cam I03 which operates the latch nose Ifll shown in Figure 4. The next or 5th generally horizontal line indicates the relative timing of the cam 16 which operates the ejection slide (see Figure 6). The lowermost or sixth generally horizontal line indicates the relative timing of the blank ejecting action of the ejector rolls 88 and 89. a

The lever 14 is held against the cam 16 by a spring projected sleeve lll supported on the pivotally mounted pin l 12.

It is, of course, to be understood that the details of structure and the arrangement of parts may be variously changed and modified without departing from the spirit and scope of the invention.

. I claim:

1. In apparatus of the character described, longitudinally extended body blank supporting ways, means for feeding body blanks having side seam packing strips affixed thereon step-by-step along said ways so as to present them at rest intervals at a succession of stations, means operable at one rest interval stop station on said ways and while a blank is at rest at said stop station for V detecting means and operable for automatically imparting movement of ejection to each blank found devoid of a packing strip. a

2. In apparatus of the character described, body blank supporting ways, step-by-step feed means for feeding station-by-station along said Ways body blanks having side seam packing strips affixed thereon, means at one stop station movable into and out of engagement with blanks stationary at said stop station and at the position on said blanks customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, and blank moving means disposed at another stop station and controlled by said detecting means for automatically engaging and imparting movement of ejection to each blank coming to rest at said another stop station after having been detected to be devoid of a packing strip.

3. In apparatus of the character described, body blank supporting ways, step-by-step feed means for feeding station-by-station along said ways body blanks having side seam packing strips afiixedthereon, means at one stop station movable into and out of engagement with blanks stationary at said stop station and at the position on said blanks customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, and blank moving means controlled by said detecting means and operable at a stop station during a rest interval of the blank feed for automatically, engaging and imparting movement of ejection to each blank detected to be devoid of a packing strip.

- 4. In apparatus of the character described, body blank supporting ways, step-by-step feed means for feeding station-by-station along said ways body blanks having side seam packing strips affixed thereon, means at one stop station movable'into and out of engagement with blanks stationary at said stop station and at the position on said blanks customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, blank moving means controlled by said detecting means and operable at a stop station during a rest interval of the blank feed for automatically engaging and imparting movement ofejection to each blank detected to be devoid of a packing strip, and means for deferring each action of the ejecting means so that each ejecting action will take place at a station other than that at which the detecting occurs.

5. In apparatus of the character described, body blank supporting ways, step-by-step feed means for feeding station-by-station along said ways body blanks having side seam packing strips affixed thereon, means at one stop station movable into and out of engagement with blanks stationary at said stop station and at the position on .said blanks customarily occupied by the packing strips thereon for detecting presence or ab sence of packing strips, blank moving means controlledby said detecting means and operable at a stop station during a rest interval of the blank feed for automatically ejecting each blank detected to be devoid of a packing strip, and cam controlled meansfor deferring each action of the ejecting means so that each ejecting action will take place at a station other than that at which the detecting occurs. a 6. In apparatus of the character described. body blank supporting ways, means for feeding along said ways body blanks having side seam packing strips afiixed thereon, means for detecting the absence of a packing strip on a blank, and means controlled by said detecting means for automatically ejecting all blanks devoid of packing strips, said last named means including an actuator slide constantly reciprocated transversely of the direction of feed of said blanks, ejecting rolls, a blank ejecting slide movable at times with the actuator slide for presenting blanks to said ejecting rolls, and latching means carried by one slide and engageable with the other slide to cause the slides to move together only when said detecting means has detected the absence of a packing strip on a blank.

7. In apparatus of the character described, body blank supporting ways, means for feeding station-by-station along said ways'body blanks having side seam packing strips afiixed thereon, means at one station movable into and out of engagement with blanks at the position customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, and means at another station controlled by said detecting means for automatically ejecting all blanks detected to be devoid of packing strips, said last named means including an actuator slide constantly reciprocated transversely of the direction of feed of said blanks, ejecting rolls, a blank ejecting slide movable at times with the actuator slide for presenting blanks to said ejecting rolls, and latching means carried by one slide and engageable with the other slide to cause the slides to move together only when said detecting means has detected the absence of a packing strip on a blank.

8. In apparatus of the character described, body blank supporting ways, means for feeding station-by-station along said ways body blanks having side seam packing strips affixed thereon, means at one station movable into and out of engagement with blanks at the position customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, and means controlled by said detecting means for automatically ejecting all blanks detected to be devoid of packing strips, said last named means including an actuator slide constantly reciprocated transversely of the direction of feed of said blanks, ejecting rolls, a blank ejecting slide movable at times with the actuator slide for presenting blanks to said ejecting rolls, latching means carried by one slide and engageable with the other slide to cause the slides to move together only when said detecting means has detected the absence of a packing strip on a blank, and means for deferring each action of the ejecting means so that each ejecting action will take place at a station other than that at which the detecting occurs.

In apparatus of the character described, body blank supporting ways, means for feeding station-by-station along said ways body blanks having side seam packing strips afiixed thereon, means at one station movable into and out of engagement with blanks at the position customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, and means controlled by said detecting means for automatically ejecting all blanks detected to be devoid of packing strips, said last named means including an actuator slide constantly reciprocated transversely of the direction of feed of said blanks, ejecting rolls, a blank ejecting slide movable at times with the actuator slide for presenting blanks to said ejecting rolls,

latching means carried by one slide and engageable with the other slide to cause the slides to move together only when said detecting means has detected the absenceof a packing strip on a blank, and cam controlled means for deferring each action of the ejecting means so that each ejecting action will take place at a station other than that at which the detecting occurs.

10. In apparatus of the character described, body blank supporting ways, means for feeding station-by-station along said ways body blanks having side seam packing strips affixed thereon, means at one station movable into and out of engagement with blanks at the position customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, means at another station controlled by said detecting means for automatically ejecting all blanks detected to be devoid of packing strips, said last named means including an actuator slide constantly reciprocated transversely of the direction of feed of said blanks, ejecting rolls, a blank ejecting slide movable at times with the actuator slide for presenting blanks to said ejecting rolls, latching means carried by one slide and engageable with the other slide to cause the slides to move together only when said detecting means has detected the absence of a packing strip on a blank, said detecting means including a contact member engageable with the blanks at the position customarily occupied by the packing, strips and forming a part of a control circuit normally insulated and broken by the engaged packing strips and completed only by blank metal contact occasioned by absence of a packing strip on a given blank, and said ejecting means including a latch position determining solenoid enerized or deenergized by the completing or breaking of said control circuit.

11. In apparatus of the character described, body blank supporting ways, means for feeding station-by-station along said ways body blanks having side seam packing strips aifixed thereon, means at one station movable into and out of engagement with blanks at the position customarily occupied by the packing strips thereon for detecting presence or absence of packing strips, and means at another station controlled by said detecting means for automatically ejecting all blanks detected to be devoid of packing strips, said last named means including an actuator slide constantly reciprocated transversely of the direction of feed of said blanks, ejecting rolls, a blank ejecting slide movable at times with the actuator slide for presenting blanks to said ejecting rolls, latching means carried by one slide and engageable with the other slide to cause the slides to move together only when said detecting means has detected the absence of a packing strip on a blank, and a latch position determining means including a'rotary cam having a dwell portion eifective to delay the latching function until the blank detected as being devoid of a packing strip has been moved to the ejecting station.

12. In apparatus of the character described, body blank supporting ways, means for feeding metallic blanks having side seam packing strips afiixed thereon longitudinally along said ways, and electrically controlled blank moving means for ejecting laterally from said ways all blanks having no packing strips afiixed thereon, said last named means including a transversely reciprocable ejector slide, a detector contact ena i 11., gagealgle with the blanks. atthe position on said b anks, c m i o c p ed y the pa kin strips, and an electrical controlcircuit and control meansactive each timesaid contact touches the-bare metal of a blank indicating the absence of apacking strip therefrom for rendering-said slide eflective to push laterally the blank devoid of a packingstrip.

, 1.3.' In apparatus of the character described, "bofiyf a k p o i g w re e n fo ieeeing metallic blanks having side seam packing strips d re n 'l neitu in r alone id wer and electricallycontroliegl means for ejecting lat-1 era-11y from said ways all blanks having no packstrips afiixed thereon, said last named means inciuding a constantly'reciprocated slide actuatcr, a transversely reciprocab'le ejector slide, a

detector contact engageable witht h blanks at t enosition on sa d b a s customari y oc upied hytheree ee' tr ps i der e tri c n circuitani control means active each tim said eet t e e m e ei a rk fl catin -g, theabsence of a packing strip-therefrom devoidof a packing strip.

145111 apparatus of the character described, body b metall c blanks haying sid a sea packing -str ips 'afixed thereon longitudinalij along said Ways,

and electrically controlled blank moving means packing strip therefrom for rendering said slide effectiveto push lateralljr the blank devoid of a "nec ng ch r n a P 19 ee er e i receijing theiolank devoidof a packing strip rom sai S de n compl in the i infirmi- I eta ic blank fha ne si am 1P3? .ne strips at ired "th o l ng n y a n i 7 a s andge 'e t i lly iwn rolled m an "fo aterall fr m, said ways all blanks na li g n peeki g "strips fixed th e n, s d" last named means inclu ine a rans e ely r i e 934364 tor'slidea detec or o ect eneaeeab i he blanks a1"-.'G1. ;pitiQn o said anks cust r ly occupied Joy the packing strips, and an electrical ontr l cir uit and con means i v a 'tirnesaid contact touches the 'bare metal oi-a b ank ind a nei he b e c O cr ki g. Strip therefrom o r nderin said. -.si de fi ct e spushilateral y the bl n de oid f ipackine p, 2

and a pair of elector rolls for receiving thelo'lank devoid of a ipackine st ip, r sa d s dev a completing the'e'je'ction thereof, means cooperating with said rolls in working e grain f r ef e ti e a p n 6 the Slide n e flei to cause "the slide to push -laterally the blank lanksupporting ways; means for *ieedi-ng 1:15; name of e wer dec eed biofiy. b an su p rt means ii e e Electing in ejected blanks sofas to cause said efiec ted blanks to lie flat; a I:

l6. In apparatus of the character described, body, blank supporting ways, means m feeding metallic blanks having side seam packing {strips aifixed thereon longitudinally wer said Ways, and, electrically cont-rolled 'means for ejecting laterally from said Waysall blanks having no packing strips aflixed thereon, said last named means including a constantly reciprocated slide actuator, a transversely reciprocable ejector slide, a detector contact engageable with the 'blanks fat the positio on said blanks customarily occupied by the packing strips, and an electrical control circuit and control meansatiiie each ti-mesaid contact touches the bar metalof a blank indicating the absence of a'packingfstfip therefrom for effecting a coupling of the slide and actuator to cause the slide to push 'latrall-y the blank devoid of a packing'str ipfand a pair of ejector rolls for receiving the blank devoid of a packing strip from said slide and completing the ejection thereof.

17. In apparatus of the character described, 7

body b-lanksuppont'ing ways, means for feeding metallic blanks having side seam packing strips affixed thereon longitudinally along said Ways, and electrically controlled means for ejecting laterally 'from said ways 'all blanks having no packing strips afiixed thereon, said last named means including a constantly reciprocated slide actuator, a transversely reciprocable "ejector slide 'a detector contact engagable with the blanks at the position ons'aid blanks customarily occupied by the packing stripsyand an electrical control circuit and control "means active each time said contact touches the bare metal of a blank indicating the absence of a packing strip therefrom for effecting acoupling' oi the slide and actuator to cause theslide to push laterally the blank devoid of a'packing'stripQand a pair of ejector rolls for receiving;the ib-larik devoid of'a packing strip fromsaid slide and compl t ing the ejection 'thjereof andi neans' cooperating with said rolls in orking the graini-n'eject'ed blanks so as to cause said ejected blanksto lie flat. I I PAUL EQPE RS N.

r Rename-sacrifice i The foll w n eferen es: a e i 11mm the file of this patent: a V v w rrant-earners Number V "Name "Date 1,772,820 Troyer Aug 12,1930 2,062,284; Bennett Dec. 1,1936 2,129,230 ONei'l' I Sept, 5,1938 2,235,377 1, 06,811 

